Curiosity finds small meteorite on Mars

It's not the first meteorite found by a rover on Mars, and won't be the last. In fact, in several ways, Mars is a meteorite-hunter's paradise. Photos here.

Check out fast-spinning ‘pumpkin’ stars

These stars produce X-rays at 100 times our sun’s peak levels. They spin so fast they've been squashed into pumpkin-like shapes.

New Horizons returns last of Pluto data

Remember when they said it would take more than a year for New Horizons to send its data back from Pluto? Now, say scientists, "We have our pot of gold."

Earth-sized planets with lots of water

A computer simulation suggests that low-mass stars might be a good place to look for Earth-sized exoplanets, in their stars' habitable zones.

Astronomers to observe Tabby’s Star

Observations begin tonight with the Green Bank radio telescope. Astronomers are seeking evidence of an extraterrestrial civilization.

Check out a new lunar crater

Sure, most of the moon's craters were made billions of years ago. But - even now - the moon is still being hit by a surprising number of meteoroids.

Seasonal change on Saturn’s moon Titan

As the Cassini mission to Saturn prepares for its grand finale, scientists sound nostalgic and thrilled about data on Titan's changing seasons.

Tracking volcanos on Jupiter’s moon Io

Scientists used earthly telescopes to track hot spots on Io over a period of years and saw that it remains the most volcanically active world in our solar system.

Boom! Orbiter spies crash site on Mars

Images from space show a dark spot on Mars' surface where none was seen before, thought to be where the Schiaparelli lander crashed on Mars last Wednesday.

More evidence for a 9th planet

Is a hypothetical large planet - far beyond Neptune - causing a tilt in the sun? Plus, evidence for a 9th planet based on "extreme Kuiper Belt objects."

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